A novel multimedia encryption and decryption technique using binary tree traversal

Abstract

In recent years, there is vast improvement in the field of telecommunication and digital world. While upsurge of the traffic will increase the security issue for any individuals. While transferring multimedia contents through the communication channels, the primary concern is the security of the data. To cope with this problem, there are several traditional and novel encryption algorithms for protecting the multimedia contents. The multimedia encryption is well defined in three categories: (i) Complete encryption (ii) Selective encryption, and (iii) Combined compression—Encryption. In this paper, the primary focus is on four block ciphers based complete encryption technique which uses a bit level substitution and permutation components to achieve high security, speed, and less computational complexity for real-time data processing. A novel algorithm is applied using a binary tree traversal for multi-bit word parallelism using substitution and a two-dimensional array to perform a nonlinear diffusion process. The result is shown in term of encryption time, memory usage, and CPU utilization. A comparison has been performed with conventional algorithms likes AES, RC5, and RC6 to prove the superiority of our proposed algorithm.